Resolves https://github.com/tuist/tuist/issues/1063
### Short description 📝
New Files created by Xcode use the Organization name set in the project file for copyright notices. The organization was left blank before this PR.
### Solution 📦
It is now possible to optionally pass the organization name to either the `Project` initializer or more generally in `Config`. The latter will override the former if set.
### Implementation 👩💻👨💻
- [x] Add new `organizationName` argument to Project
- [x] Add new `organizationName` GenerationOptions case to pass to Config
- [x] Use project `organizationName` during pbxproj generation via attributes
- [x] Add Tests
Sylvain Rebaud